Rational Modes of Inertial Impact Fracture of Rocks
E. G. Kulikova1,2, S. Ya. Levenson1, A. V. Morozov1
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk State Technical University, Novosibirsk, Russia
Keywords: Inertial impact, rotary hammer drill, rotation speed, hammer feed, electric current consumption, vibration velocity, supporting members
Abstract
The article describes inertial impact fracture of geomaterials using a rotary hammer drill. The capabilities of the tool in underground large-hole drilling are discussed. The authors present the procedure and results of the lab-scale testing of influence exerted by different combinations of rotational and linear path velocities of the rotary hammer drill on the strength of current taken by working tools and on the shock vibration velocity of supporting members of the rotary hammer drill. The rational ranges of these velocities, such as the process of fracture runs at the least energy input and minimum impact on the working tools, are determined.
|
